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 A231252 Number of 7Xn 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero 1
 0, 778, 185074, 12322784, 1130422470, 122516675112, 13176773912306, 1401330180537464, 149128308807116274, 15891308131288905986, 1693734891060505493574, 180514807902138511042510 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 7 of A231246 LINKS R. H. Hardin, Table of n, a(n) for n = 1..59 EXAMPLE Some solutions for n=2 ..0..1....0..3....0..1....0..3....0..1....0..3....0..3....0..3....0..3....0..3 ..2..3....2..1....2..1....2..1....2..3....2..1....2..1....0..1....0..1....0..1 ..1..0....2..1....0..3....0..1....1..0....0..1....2..1....2..3....2..3....2..3 ..3..2....0..3....2..1....2..3....3..2....2..1....0..3....2..1....2..1....0..3 ..1..2....0..3....3..0....2..1....1..0....0..3....2..1....0..3....0..3....2..1 ..1..0....0..1....1..2....3..0....1..0....0..1....0..3....2..3....0..3....3..0 ..3..2....2..3....1..0....1..2....3..2....2..3....2..3....2..1....2..1....1..2 CROSSREFS Sequence in context: A008746 A231062 A200559 * A341190 A147547 A259924 Adjacent sequences: A231249 A231250 A231251 * A231253 A231254 A231255 KEYWORD nonn AUTHOR R. H. Hardin, Nov 06 2013 STATUS approved

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Last modified March 20 17:37 EDT 2023. Contains 361391 sequences. (Running on oeis4.)